Permissions: • control vibrator: to vibrate after the timer expires • read external storage: to enable selecting a custom ringtone stored on the SD card to be played when the timer expires

A review of the app is available on this blog post: http://www.craigrogers.photography/?p=2548

You can join the beta test program here: https://play.google.com/apps/testing/com.quicosoft.exposurecalculator.app

Note: in the Shutter settings section there is a switch tor camera type. This switch simply selects how a small set of shutter speeds around 1 second are displayed, choose the one your camera adheres to. Exposure calculations work for all camera makes, this switch is simply for display purposes.

Note2: if you're reading this the app will use English on your device. If this is not acceptable to you, please do not install the app.

Please contact me if you'd like to help translating the app into your language.